Spray gun



FIG. 1 is a front isometric view of an improved spray gun;

FIG. 2 is a rear isometric view of the spray gun;

FIG. 3 is a front view of the spray gun;

FIG. 4 is a back view of the spray gun;

FIG. 5 is a left side view of the spray gun;

FIG. 6 is a right side view of the spray gun;

FIG. 7 is a top view of the spray gun; and,

FIG. 8 is a bottom view of the spray gun. 

The ornamental design for a spray gun, as shown and described. 